What causes fog? Meteorologist explains

The National Weather Service (NWS) says that as the earth’s surface continues to cool, provided a deep enough layer of moist air is present near the ground, the humidity will reach 100% and fog will form.

“Fog is just basically a cloud at the surface,” First Alert meteorologist Adam Berg says.

“So fog is made up of these little water particles right? So when you flash the high beams, you actually get a lot of that light bouncing back at you and it can actually blind you”.

Tips from the National Weather Service for driving in fog

• Drive with lights on low beam.
• Reduce speed. Allow for plenty of room between you and other cars.
• Avoid crossing traffic unless absolutely necessary.
• Listen for traffic you cannot see.
• Use wipers and defroster as necessary for maximum vision.
• Be patient! Don’t pass lines of traffic.
• Unless absolutely necessary, don’t stop on any freeway or other heavily traveled road.
• If your car is disabled or you can’t continue, pull well onto the shoulder and turn off lights. Move away from your vehicle.
• Consider postponing your trip until the fog clears.
• Be especially cautious in and near school zones. Watch for flashing yellow or red signals on school buses. Watch for children waiting for buses in the fog.
• Also, be aware that smoke from grass and forest fires along roadways can combine with fog to rapidly drop visiblities to zero.